CVE-2026-57963
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Jul 01, 2026
Vendor
unknown
Description
An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.